class Index {
    constructor () {
        this.index = 0;
        this.principal = []

        footer();
        this.getClassList()
    }


    async getClassList() {
    
        var self = this;
        if (localStorage.getItem("principal") == null) {
            var res = await indexServe.classList();
            this.principal = res.principal
            localStorage.setItem("principal", JSON.stringify(this.principal))
            localStorage.setItem("additional", JSON.stringify(res.additional))
        } else {
            this.principal = JSON.parse(localStorage.getItem("principal"))
        }
        console.log("123456",this.principal)


        this.principal.forEach((v,i) => {
            $(".header_menu ul").html(`
              <li class="${i == 0 ? 'active' : ''}">${v.title}</li>
            `)

            $(".page_wrapper").html(`
               <div class="swiper-slide">
                  <div class="list">
                  </div>
                </div>
            `);

            _(".swiper-wrapper .swiper-slide").forEach(v => {
                v.onscroll = () => {
                    const {clientHeight, scrollHeight, scrollTop} = v;
                    const distance = scrollHeight- scrollTop - clientHeight;
                    if(distance <= 0) {
                        // 首页
                        console.log("滚动到底部...");
                        if (this.index == 0) {
                            this.getIndex()
                        } else {
                            this.principal[this.index].page += 1
                            if (this.principal[this.index].page <= this.principal[this.index].total_page) {
                                this.getClassListArr("more")
                            } else {
                                console.log("已经没有数据了！！！");
                            }
                        }
                    }
                }
            })
        })

        click(_(".header_menu ul li"), function () {
            self.changeActive(this.index)
        })

        this.getIndex()
        this.initPage()
    }

    async getClassListArr(type = "click") {
        var getData = async () => {
            var res = await indexServe.classListArr({
                page: this.principal[this.index].page,
                id: this.principal[this.index].id
            });

            this.principal[this.index].total_page = res.total_page

            this.principal[this.index].content = [
                ...this.principal[this.index].content,
                ...res.data
            ];

            item(
                _(".swiper-slide .list")[this.index],
                // this.principal[this.index].content
                res.data
            )
        }

        if (type == "click") {
            if (this.principal[this.index].id != -1) {
                if (this.principal[this.index].content.length == 0) {
                    getData()
                }
            }
        } else {
            getData()
        }
    }

    changeActive(index) {
        this.index = index
        _(".header_menu ul li").forEach(v => v.remove("active"))
        _(".header_menu ul li")[index].add("active")
        this.mySwiper.slideTo(index)
    }

    async getIndex() {
        var res = await indexServe.index();
        this.principal[this.index].content = [
            ...this.principal[this.index].content,
            ...res.list
        ];

        item(_(".swiper-slide .list")[this.index], res.list)

    }

    initPage() {
        var self = this;
        this.mySwiper = new Swiper('.swiper-container', {
            direction: 'horizontal', 
            on:{
                slideNextTransitionEnd: function() {

                  self.changeActive(this.activeIndex)
                  self.getClassListArr()
                },
            },
          })  
    }
}

new Index()